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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div></div>
    <div></div>
    <div></div>
    <script>
        //数组的合并
        const kuaizi = ['a', 'b']
        const fenghuang = ['c', 'd']
        const zuixuanxiaopingguo = [...kuaizi, ...fenghuang]
        console.log(zuixuanxiaopingguo)

        const sanzhihua = ['E', 'G', 'M']
        const sanyecao = [...sanzhihua] //['E','G','M']
        console.log(sanyecao)

        //将伪数组转为真正的数组
        const divs = document.querySelectorAll('div');
        const divArr = [...divs]
        console.log(divArr)
    </script>

</body>

</html>